Diversifying crop rotations with temporary grasslands - Université de ...
Diversifying crop rotations with temporary grasslands - Université de ...
Diversifying crop rotations with temporary grasslands - Université de ...
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ANNEXE 3: WEED SPECIES OF THE LARGE-SCALE SURVEYS<br />
A total of 197 weed taxa were distinguished in the large-scale weed surveys in Chizé<br />
comprising 161 species and 36 groups of several species of the same genus, which were<br />
pooled together due to <strong>de</strong>termination difficulties (see Table 14 for a complete species list).<br />
The overall frequency of occurrence of these taxa closely followed a negative exponential<br />
distribution <strong>with</strong> few frequent and many rare species (see Fig. 26 for <strong>de</strong>tails).<br />
Table 14: Weed species of the large-scale surveys (Chizé).<br />
Name contains species, groups of species (separated <strong>with</strong> ‘+’), sometimes <strong>with</strong> un<strong>de</strong>fined species (‘sp’), and<br />
genera <strong>with</strong>out any <strong>de</strong>termined species (‘spp’). Co<strong>de</strong>s are 5-letter Bayer/WSSA computer co<strong>de</strong>s (3 letters for the<br />
genera, 2 for the species) or 3-letter genera co<strong>de</strong>s. Frequencies <strong>de</strong>signate the absolute number of micro-plots in<br />
the Chizé weed surveys where the species has been observed out of 18441 micro-plots in total (confounding all<br />
seven <strong>crop</strong>s and three survey years). Life cycle distinguishes three categories: annual species (A), perennial<br />
species (P) and intermediate species (I, <strong>with</strong> biennial or variable life cycles). Mono/Dicot distinguishes grasses<br />
(monocots, M) and broadleaved species (dicots, D). Morphology distinguishes four morphological types for the<br />
broad-leaved species. FG,<br />
Functional Group, distinguishes eight types of species based on the three criteria life<br />
cycle, number of cotyledons and morphology (see methods of Article 2 for <strong>de</strong>tails on FGs).<br />
Name of species /genera<br />
Co<strong>de</strong> Freq. Life cycle Mono/Dicot Morphology FG<br />
Achillea millefolium ACHMI 1 P D rosette 6<br />
Adonis spp ADO 56 A D upright 1<br />
Aegopodium podagraria AEOPO 5 P D rosette 6<br />
Aethusa cynapium AETCY 70 A D rosette 4<br />
Agrostis stolonifera +sp AGSST 26 P M grass 8<br />
Alliaria petiolata ALAPE 4 I D upright 5<br />
Allium spp ALL 69 P M upright 8<br />
Alopecurus myosuroi<strong>de</strong>s ALOMY 1686 A M grass 7<br />
Amaranthus retroflexus AMARE 401 A D upright 1<br />
Ambrosia artemisiifolia AMBEL 23 A D upright 1<br />
Ammi majus AMIMA 290 A D rosette 4<br />
Anagallis arvensis ANGAR 1637 A D creeping, other 3<br />
Anagallis foemina ANGCO 31 A D creeping, other 3<br />
Anthemis ANT 11 A D rosette 4<br />
Anthriscus caucalis ANRCA 13 A D rosette 4<br />
Anthriscus sylvestris ANRSY 15 P D rosette 6<br />
Apera spica-venti APESV 18 A M grass 7<br />
Aphanes arvensis APHAR 919 A D creeping, other 3<br />
Arabidopsis thaliana ARBTH 24 A D rosette 4<br />
Arctium lappa ARFLA 5 I D rosette 5<br />
Arenaria serpyllifolia ARISE 273 A D creeping, other 3<br />
Arrhenatherum elatius ARREB 53 P M grass 8<br />
Artemisia vulgaris ARTVU 18 P D upright 6<br />
Arum sp ABG 2 P M upright 8<br />
204